82969881 has 4 divisors (see below), whose sum is σ = 110626512. Its totient is φ = 55313252.

The previous prime is 82969879. The next prime is 82969889. The reversal of 82969881 is 18896928.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82969881 - 2¹ = 82969879 is a prime.

It is a super-2 number, since 2×82969881² = 13768002306308322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82969889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13828311 + ... + 13828316.

It is an arithmetic number, because the mean of its divisors is an integer number (27656628).

Almost surely, 2^82969881 is an apocalyptic number.

It is an amenable number.

82969881 is a deficient number, since it is larger than the sum of its proper divisors (27656631).

82969881 is a wasteful number, since it uses less digits than its factorization.

82969881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27656630.

The product of its digits is 497664, while the sum is 51.

The square root of 82969881 is about 9108.7804342843. The cubic root of 82969881 is about 436.1542972252.

The spelling of 82969881 in words is "eighty-two million, nine hundred sixty-nine thousand, eight hundred eighty-one".